REVENUE RECOGNITION (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
REVENUE RECOGNITION [Abstract]
Unearned tuition	$ 21,844		$ 21,844		$ 24,154
Revenue recognized included in contract liability			23,300
Disaggregation of Revenue [Abstract]
Total revenues	99,618	$ 91,813	275,548	$ 256,510
Services Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	7,494	7,710	18,101	17,474
Services Transferred over Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	92,124	84,103	257,447	239,036
Campus Operations [Member]
Disaggregation of Revenue [Abstract]
Total revenues	99,527	90,085	274,093	251,216
Campus Operations [Member] | Services Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	7,489	7,627	18,084	17,225
Campus Operations [Member] | Services Transferred over Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	92,038	82,458	256,009	233,991
Transitional [Member]
Disaggregation of Revenue [Abstract]
Total revenues	91	1,728	1,455	5,294
Transitional [Member] | Services Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	5	83	17	249
Transitional [Member] | Services Transferred over Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	$ 86	$ 1,645	$ 1,438	$ 5,045